3 November 2005 High pulse energy mid-infrared laser source
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Nonlinear optical conversion of 500 mJ pulses from a Nd:YAG laser to the mid-infrared is demonstrated in a two-step architecture. Using a type 2 phase matched KTiOPO4-based master-oscillator/power-amplifier (MOPA) architecture for conversion to 2 μm, 140 mJ signal at 2.08 μm with M2 = 2.3 and 80 mJ idler at 2.18 μm were obtained. Using 58 mJ of the signal beam to pump a ZnGeP2-based MOPA, we have obtained 21 mJ in the 3-5 μm range with M2 ≈ 15.
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Gunnar Rustad, Stephane Nicolas, Ørnulf Nordseth, Gunnar Arisholm, "High pulse energy mid-infrared laser source", Proc. SPIE 5989, Technologies for Optical Countermeasures II; Femtosecond Phenomena II; and Passive Millimetre-Wave and Terahertz Imaging II, 598904 (3 November 2005); doi: 10.1117/12.629870; https://doi.org/10.1117/12.629870

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